3BSD/usr/include/sys/param.h
/* param.h 2.1 1/5/80 */
/*
* tunable variables
*
* NB: NBUF is well known in locore.s
*/
#define NBUF 48 /* size of buffer cache */
#define NINODE 200 /* number of in core inodes */
#define NFILE 175 /* number of in core file structures */
#define NMOUNT 8 /* number of mountable file systems */
#define MAXUPRC 25 /* max processes per user */
#define SSIZE 4 /* initial stack size (*512 bytes) */
#define SINCR 4 /* increment of stack (*512 bytes) */
#define NOFILE 20 /* max open files per process */
#define CANBSIZ 256 /* max size of typewriter line */
#define SMAPSIZ (4*NPROC) /* size of swap allocation area */
#define NCALL 40 /* max simultaneous time callouts */
#define NPROC 125 /* max number of processes */
#define NTEXT 60 /* max number of pure texts */
#define NCLIST 500 /* max total clist size */
#define HZ 60 /* Ticks/second of the clock */
#define TIMEZONE (8*60) /* Minutes westward from Greenwich */
#define DSTFLAG 1 /* Daylight Saving Time applies in this locality */
#define MSGBUFS 128 /* Characters saved from error messages */
#define NCARGS 5120 /* # characters in exec arglist */
/*
* priorities
* probably should not be
* altered too much
*/
#define PSWP 0
#define PINOD 10
#define PRIBIO 20
#define PRIUBA 24
#define PZERO 25
#define PPIPE 26
#define PWAIT 30
#define PSLEP 40
#define PUSER 50
#define NZERO 20
/*
* signals
* dont change
*/
#define NSIG 17
/*
* No more than 16 signals (1-16) because they are
* stored in bits in a word.
*/
#define SIGHUP 1 /* hangup */
#define SIGINT 2 /* interrupt (rubout) */
#define SIGQUIT 3 /* quit (FS) */
#define SIGINS 4 /* illegal instruction */
#define SIGTRC 5 /* trace or breakpoint */
#define SIGIOT 6 /* iot */
#define SIGEMT 7 /* emt */
#define SIGFPT 8 /* floating exception */
#define SIGKIL 9 /* kill, uncatchable termination */
#define SIGBUS 10 /* bus error */
#define SIGSEG 11 /* segmentation violation */
#define SIGSYS 12 /* bad system call */
#define SIGPIPE 13 /* end of pipe */
#define SIGCLK 14 /* alarm clock */
#define SIGTRM 15 /* Catchable termination */
/*
* fundamental constants of the implementation--
* cannot be changed easily.
* note: UPAGES is well known in locore.s
*/
#define NBPW sizeof(int) /* number of bytes in an integer */
#define UPAGES 6 /* pages of u-area */
#define NULL 0
#define CMASK 0 /* default mask for file creation */
#define NODEV (dev_t)(-1)
#define ROOTINO ((ino_t)2) /* i number of all roots */
#define SUPERB ((daddr_t)1) /* block number of the super block */
#define DIRSIZ 14 /* max characters per directory */
/*
* Clustering of hardware pages on machines with ridiculously small
* page sizes is done here. The paging subsystem deals with units of
* CLSIZE pte's describing NBPG (from vm.h) pages each... BSIZE must
* be CLSIZE*NBPG in the current implementation, that is the paging subsystem
* deals with the same size blocks that the file system uses.
*
* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE
*/
#define CLSIZE 2
/* give the base virtual address (first of CLSIZE) */
#define clbase(i) ((i) &~ (CLSIZE-1))
/* round a number of clicks up to a whole cluster */
#define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1))
#if CLSIZE==1
#define BSIZE 512 /* size of secondary block (bytes) */
#define INOPB 8 /* 8 inodes per block */
#define BMASK 0777 /* BSIZE-1 */
#define BSHIFT 9 /* LOG2(BSIZE) */
#define NMASK 0177 /* NINDIR-1 */
#define NSHIFT 7 /* LOG2(NINDIR) */
#define NICINOD 100 /* number of superblock inodes */
#define NICFREE 50 /* number of superblock free blocks */
#endif
#if CLSIZE==2
#define BSIZE 1024
#define INOPB 16
#define BMASK 01777
#define BSHIFT 10
#define NMASK 0377
#define NSHIFT 8
#define NICINOD 100
#define NICFREE 178
#endif
#if CLSIZE==4
#define BSIZE 2048
#define INOPB 32
#define BMASK 03777
#define BSHIFT 11
#define NMASK 0777
#define NSHIFT 9
#define NICINOD 100
#define NICFREE 434
#endif
/* inumber to disk address and inumber to disk offset */
#define itod(x) ((daddr_t)((((unsigned)(x)+2*INOPB-1)/INOPB)))
#define itoo(x) ((int)(((x)+2*INOPB-1)%INOPB))
/* file system blocks to disk blocks and back */
#define fsbtodb(b) ((b)*CLSIZE)
#define dbtofsb(b) ((b)/CLSIZE)
/* BSLOP can be 0 unless you have a TIU/Spider */
#define BSLOP 0 /* In case some device needs bigger buffers */
#define NINDIR (BSIZE/sizeof(daddr_t))
#define CBSIZE 28 /* number of chars in a clist block */
#define CROUND 0x1F /* clist rounding; sizeof(int *) + CBSIZE -1*/
#define CLKTICK (1000000/(HZ)) /* microseconds in a clock tick */
/*
* Some macros for units conversion
*/
/* Core clicks (512 bytes) to segments and vice versa */
#define ctos(x) (x)
#define stoc(x) (x)
/* Core clicks (512 bytes) to disk blocks */
#define ctod(x) (x)
/* clicks to bytes */
#define ctob(x) ((x)<<9)
/* bytes to clicks */
#define btoc(x) ((((unsigned)(x)+511)>>9))
/* major part of a device */
#define major(x) ((int)(((unsigned)(x)>>8)&0377))
/* minor part of a device */
#define minor(x) ((int)((x)&0377))
/* make a device number */
#define makedev(x,y) ((dev_t)(((x)<<8) | (y)))
typedef struct { int r[1]; } * physadr;
typedef int daddr_t;
typedef char * caddr_t;
typedef unsigned short ino_t;
typedef int swblk_t;
typedef int size_t;
typedef int time_t;
typedef int label_t[10];
typedef short dev_t;
typedef int off_t;
/*
* Machine-dependent bits and macros
*/
#define UMODE PSL_CURMOD /* usermode bits */
#define USERMODE(ps) (((ps) & UMODE) == UMODE)
#define BASEPRI(ps) (((ps) & PSL_IPL) != 0)
#ifdef KERNEL
#ifdef lint
int __void__;
#define VOID __void__ = (int)
#else
#define VOID
#endif
#endif